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CVE-2021-32841

20
FAUCET Score

CVE-2021-32841 is a directory traversal vulnerability affecting SharpZipLib versions 1.3.0 through 1.3.2. The flaw arises from insufficient validation of destination directory paths, potentially allowing an attacker to create files outside the intended directory, albeit with limited naming conventions. Rated Medium severity (CVSS 5.3), it has a low impact on integrity (I:L) and requires no user interaction or privileges. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.3.0, < 1.3.3CPE matchmatch criteria
cpe:2.3:a:sharpziplib_project:sharpziplib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.0MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.5
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 39th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
nugetpatch availablevia ghsa
Product: SharpZipLibFixed in: 1.3.3

Vendor Advisories (1)

nugetGHSA-2x7h-96h5-rq84medium

Path Traversal in SharpZipLib

Feb 1, 2022

References

github.com / icsharpcode/SharpZipLib/commit/5c3b293de5d65b108e7f2cd0ea8f81c1b8273f78
PatchThird Party Advisory
github.com / icsharpcode/SharpZipLib/releases/tag/v1.3.3
Release NotesThird Party Advisory
securitylab.github.com / advisories/GHSL-2021-125-sharpziplib
ExploitThird Party Advisory